Why does my computer power supply not have 5 Volts Tags: Power Supplies Computer Systems Last response: December 30, 2010 2:43 PM in Systems Share MSCMOE December 30, 2010 12:33:30 AM Hello, why does my computer power supply show 3 volts and 12 volts but not 5 volts? More about : computer power supply volts jaguarskx a b ) Power supply December 30, 2010 5:02:23 AM don't know and you posted in the wrong section. There should be a 5 volt lead since the hard drive uses both 5v and 12v. Anonymous a b ) Power supply December 30, 2010 8:10:44 AM This topic has been moved from the section Computer Peripherals to section Systems by Fihart Can't find your answer ? Ask ! Get the answer Onus a c 78 ) Power supply December 30, 2010 2:43:37 PM You must be referring to the -5V rail. That rail is obsolete. It was used by some AT expansion cards way back when. Very few PSUs have it any more, and those that do I would not trust to be of sufficient quality to power a modern PC. Can't find your answer ? Ask ! Publish Related resources: ForumGray wire on power supply only reads 4.6 volts ForumWhy does my computer insist 3.53 volts I/O ? ForumPower Supply doesnt have - 5 V, Does motherboard need? ForumDo any sata drives use the 3.3 volts from the plug? ForumBad volts ??? Bad power supply ??? ForumPower supply volts are all over the place ForumDoes an expensive power supply is required to run a HD4850? ForumWhy does my power supply burn up Forum[Resolved] Why a 4 pin and 8 pin 12 volt power connector? Forum1.2 Tualitan- how many volts is too many? ForumIs power for Duron nealry all at 12 volts ? ForumCan the XFX 6670 1GB DDR 5 run on a 350w power supply ? ForumWill my power supply handle an HD 6670? ForumHow big of a power supply do I need Forum240 volts to 220 volts ForumBig question: DOES power supply affect performance? ForumPCI compatibility question ForumComputer Forum650-700 gaming computer help Forum[Solved] Computer wont power on. More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !